svn-gvsig-desktop / trunk / applications / appgvSIG / src / com / iver / cit / gvsig / gui / toc / DnDJTree.java @ 6880
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/*
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* Created on 02-jun-2004
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*
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*/
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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package com.iver.cit.gvsig.gui.toc; |
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/*
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** This is version II of DnDJTree. The first version allowed for what I
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** thought was a JDK oversight. However, we can set the cursor appropriately,
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** relative to whether the current cursor location is a valid drop target.
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**
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** If this is your first time reading the source code. Just ignore the above
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** comment and ignore the "CHANGED" comments below. Otherwise, the
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** "CHANGED" comments will show where the code has changed.
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**
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** Credit for finding this shortcoming in my code goes Laurent Hubert.
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** Thanks Laurent.
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**
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** Rob. [ rkenworthy@hotmail.com ]
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*/
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import java.awt.Component; |
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import java.awt.Cursor; |
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import java.awt.Point; |
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import java.awt.datatransfer.Transferable; |
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import java.awt.datatransfer.UnsupportedFlavorException; |
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import java.awt.dnd.DnDConstants; |
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import java.awt.dnd.DragGestureEvent; |
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import java.awt.dnd.DragGestureListener; |
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import java.awt.dnd.DragGestureRecognizer; |
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import java.awt.dnd.DragSource; |
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import java.awt.dnd.DragSourceDragEvent; |
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import java.awt.dnd.DragSourceDropEvent; |
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import java.awt.dnd.DragSourceEvent; |
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import java.awt.dnd.DragSourceListener; |
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import java.awt.dnd.DropTarget; |
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import java.awt.dnd.DropTargetDragEvent; |
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import java.awt.dnd.DropTargetDropEvent; |
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import java.awt.dnd.DropTargetEvent; |
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import java.awt.dnd.DropTargetListener; |
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import java.awt.event.InputEvent; |
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import java.io.IOException; |
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import java.util.ArrayList; |
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import javax.swing.JTree; |
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import javax.swing.SwingUtilities; |
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import javax.swing.event.TreeSelectionEvent; |
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import javax.swing.event.TreeSelectionListener; |
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import javax.swing.tree.DefaultMutableTreeNode; |
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import javax.swing.tree.DefaultTreeModel; |
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import javax.swing.tree.MutableTreeNode; |
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import javax.swing.tree.TreeModel; |
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import javax.swing.tree.TreeNode; |
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import javax.swing.tree.TreePath; |
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import com.iver.andami.PluginServices; |
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import com.iver.cit.gvsig.fmap.layers.FLayer; |
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import com.iver.cit.gvsig.fmap.layers.FLayers; |
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import com.iver.cit.gvsig.gui.View; |
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public class DnDJTree extends JTree |
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implements TreeSelectionListener, |
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DragGestureListener, DropTargetListener, |
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DragSourceListener {
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protected ArrayList m_Listeners = new ArrayList(); |
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private static DnDJTree oDnDtocOrigin = null; |
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private static DnDJTree oDnDtocDestination = null; |
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/** Stores the parent Frame of the component */
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// private Frame Parent = null;
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/** Stores the selected node info */
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protected TreePath SelectedTreePath = null; |
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protected DefaultMutableTreeNode SelectedNode = null; |
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/** Variables needed for DnD */
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private DragSource dragSource = null; |
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//private DragSourceContext dragSourceContext = null;
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private DropTarget dropTarget; |
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//private ArrayList treeListeners=new ArrayList();
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//private ArrayList dropListeners=new ArrayList();
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// private TreeModel model1;
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/** Constructor
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@param root The root node of the tree
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@param parent Parent JFrame of the JTree */
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public DnDJTree(TreeModel treeModel) { |
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super(treeModel);
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// Parent = parent;
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//addTreeSelectionListener(this);
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/* ********************** CHANGED ********************** */
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dragSource = DragSource.getDefaultDragSource() ;
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/* ****************** END OF CHANGE ******************** */
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DragGestureRecognizer dgr =
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dragSource.createDefaultDragGestureRecognizer( |
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this, //DragSource |
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DnDConstants.ACTION_COPY_OR_MOVE, //specifies valid actions |
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this //DragGestureListener |
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); |
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/* Eliminates right mouse clicks as valid actions - useful especially
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* if you implement a JPopupMenu for the JTree
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*/
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dgr.setSourceActions(dgr.getSourceActions() & ~InputEvent.BUTTON3_MASK);
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/* First argument: Component to associate the target with
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* Second argument: DropTargetListener
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*/
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//DropTarget dropTarget = new DropTarget(this, this);
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setDropTarget(); |
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} |
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public void invalidateListeners(){ |
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removeDropListener(); |
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removeTreeListener(); |
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} |
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private void addDropListener(){ |
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dropTarget= new DropTarget(this, this); |
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} |
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private void removeDropListener(){ |
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dropTarget=null;
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} |
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private void addTreeListener(){ |
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addTreeSelectionListener(this);
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} |
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private void removeTreeListener(){ |
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removeTreeSelectionListener(this);
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} |
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public void setDropTarget(){ |
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// TODO: COMENTADO POR FJP
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/* com.iver.andami.ui.mdiManager.View[] views=PluginServices.getMDIManager().getAllViews();
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for(int i=0;i<views.length;i++){
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if (views[i] instanceof View){
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// model1=((View)views[i]).getTOC().getTree().getModel();
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((View)views[i]).getTOC().getTree().removeTreeListener();
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((View)views[i]).getTOC().getTree().addTreeListener();
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((View)views[i]).getTOC().getTree().removeDropListener();
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((View)views[i]).getTOC().getTree().addDropListener();
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} */
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addTreeListener(); |
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addDropListener(); |
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// }
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////////// new DropTarget(this, this);
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} |
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/** Returns The selected node */
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public DefaultMutableTreeNode getSelectedNode() { |
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return SelectedNode;
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} |
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///////////////////////// Interface stuff ////////////////////
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/** DragGestureListener interface method */
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public void dragGestureRecognized(DragGestureEvent e) { |
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//Get the selected node
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DefaultMutableTreeNode dragNode = getSelectedNode();
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if (dragNode != null) { |
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if (!(dragNode.getUserObject() instanceof Transferable)) return; |
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// Get the Transferable Object
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Transferable transferable = (Transferable) dragNode.getUserObject(); |
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/* ********************** CHANGED ********************** */
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//Select the appropriate cursor;
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// Cursor cursor = DragSource.DefaultCopyNoDrop;
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int action = e.getDragAction();
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/* if (action == DnDConstants.ACTION_MOVE)
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cursor = DragSource.DefaultMoveDrop; */
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//In fact the cursor is set to NoDrop because once an action is rejected
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// by a dropTarget, the dragSourceListener are no more invoked.
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// Setting the cursor to no drop by default is so more logical, because
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// when the drop is accepted by a component, then the cursor is changed by the
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// dropActionChanged of the default DragSource.
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/* ****************** END OF CHANGE ******************** */
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//begin the drag
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oDnDtocOrigin = this;
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dragSource.startDrag(e, null, transferable, this); |
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} |
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} |
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/** DragSourceListener interface method */
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public void dragDropEnd(DragSourceDropEvent dsde) { |
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} |
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/** DragSourceListener interface method */
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public void dragEnter(DragSourceDragEvent dsde) { |
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/* ********************** CHANGED ********************** */
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// System.err.println("dragOver" + dsde.getDragSourceContext().getComponent());
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/* ****************** END OF CHANGE ******************** */
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} |
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/** DragSourceListener interface method */
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public void dragOver(DragSourceDragEvent dsde) { |
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/* ********************** CHANGED ********************** */
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// System.err.println("dragOver" + dsde.getDragSourceContext().getComponent());
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/* ****************** END OF CHANGE ******************** */
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} |
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/** DragSourceListener interface method */
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public void dropActionChanged(DragSourceDragEvent dsde) { |
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} |
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/** DragSourceListener interface method */
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public void dragExit(DragSourceEvent dsde) { |
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} |
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/** DropTargetListener interface method - What we do when drag is released */
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public void drop(DropTargetDropEvent e) { |
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try {
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Transferable tr = e.getTransferable();
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//flavor not supported, reject drop
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if (!tr.isDataFlavorSupported( TocItemBranch.INFO_FLAVOR)) e.rejectDrop();
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//cast into appropriate data type
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TocItemBranch childInfo = |
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(TocItemBranch) tr.getTransferData( TocItemBranch.INFO_FLAVOR ); |
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//get new parent node
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Point loc = e.getLocation();
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TreePath destinationPath = getPathForLocation(loc.x, loc.y);
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final String msg = testDropTarget(destinationPath, SelectedTreePath); |
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if (msg != null) { |
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/* if (testSameComponent())
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{ */
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e.rejectDrop(); |
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SwingUtilities.invokeLater(new Runnable() { |
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public void run() { |
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System.err.println(msg);
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} |
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}); |
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return;
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/* }
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else
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{
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// TODO: Por ahora solo dejamos mover, no copiar
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// TODO: ?Y qu? pasa si la vista a la que vamos
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// no tiene la misma proyecci?n? MEJOR DESHABILITO ESTO POR AHORA
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if (e.getDropAction() == DnDConstants.ACTION_MOVE)
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dropRoot(SelectedNode);
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else
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e.rejectDrop();
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return;
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} */
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} |
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if (!testSameComponent(e))
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{ |
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e.rejectDrop(); |
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return;
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} |
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int oldPos,newPos;
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//boolean isContainer=false;
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DefaultMutableTreeNode nodoTocado =
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(DefaultMutableTreeNode) destinationPath.getLastPathComponent();
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// get old parent node
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DefaultMutableTreeNode oldParent = (DefaultMutableTreeNode) getSelectedNode().getParent(); |
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if (nodoTocado.getParent().equals(getSelectedNode())){
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return;
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} |
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//oldParent.setUserObject(new TocItemBranch(((TocItemBranch)getSelectedNode().getUserObject()).getLayer().getParentLayer()));
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oldPos = oldParent.getIndex(getSelectedNode()); |
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// Para no tener en cuenta los nodos de s?mbolos:
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if (!(nodoTocado.getUserObject() instanceof TocItemBranch)){ |
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nodoTocado = (DefaultMutableTreeNode) nodoTocado.getParent();
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} |
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///posActual = oldParent.getIndex(getSelectedNode());
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//Destino
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DefaultMutableTreeNode destParent=null; |
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if (((TocItemBranch)nodoTocado.getUserObject()).getLayer() instanceof FLayers){ |
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//isContainer=true;
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newPos=0;
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destParent=nodoTocado; |
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}else{//Si donde se deja la capa seleccionada no es un contenedor de capas. |
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destParent= (DefaultMutableTreeNode)nodoTocado.getParent();
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newPos=destParent.getIndex(nodoTocado); |
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} |
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int action = e.getDropAction();
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boolean copyAction = (action == DnDConstants.ACTION_COPY); |
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//make new child node
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DefaultMutableTreeNode newChild = new DefaultMutableTreeNode(childInfo); |
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if (getSelectedNode().getAllowsChildren()){
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int childs=getSelectedNode().getChildCount();
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for (int i=0;i<childs;i++){ |
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newChild.add((MutableTreeNode)getSelectedNode().getChildAt(0)); |
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} |
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} |
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try {
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if (!copyAction){
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oldParent.remove(getSelectedNode()); |
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destParent.insert(newChild,newPos); |
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// newParent.add(newChild);
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} |
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if (copyAction) e.acceptDrop (DnDConstants.ACTION_COPY); |
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else e.acceptDrop (DnDConstants.ACTION_MOVE); |
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} |
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catch (java.lang.IllegalStateException ils) {
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e.rejectDrop(); |
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} |
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e.getDropTargetContext().dropComplete(true);
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//expand nodes appropriately - this probably isnt the best way...
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// TODO: COMENTADO POR FJP
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/* com.iver.andami.ui.mdiManager.View[] views=PluginServices.getMDIManager().getAllViews();
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for(int i=0;i<views.length;i++){
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if (views[i] instanceof View){
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((DefaultTreeModel)((View)views[i]).getTOC().getTree().getModel()).reload(oldParent);
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}
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} */
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// ((DefaultTreeModel)model1).reload(oldParent);
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DefaultTreeModel model = (DefaultTreeModel) getModel(); |
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model.reload(destParent); |
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FLayers lpo=null;
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FLayers lpd=null;
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if (oldParent.getUserObject() instanceof TocItemBranch){ |
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lpo=(FLayers)((TocItemBranch)oldParent.getUserObject()).getLayer(); |
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//lpd=(FLayers)((TocItemBranch)destParent.getUserObject()).getLayer();
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}/*else if (((TocItemBranch)nodoTocado.getUserObject()).getLayer().getParentLayer()!=null){
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lpo=((TocItemBranch)nodoTocado.getUserObject()).getLayer().getParentLayer();
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}*/else{ |
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lpo=(FLayers)((TocItemBranch)getSelectedNode().getUserObject()).getLayer().getParentLayer(); |
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} |
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if (destParent.getUserObject() instanceof TocItemBranch){ |
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lpd=(FLayers)((TocItemBranch)destParent.getUserObject()).getLayer(); |
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}else{
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lpd=((TocItemBranch)nodoTocado.getUserObject()).getLayer().getParentLayer(); |
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} |
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if (destParent.equals(oldParent)){
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callListeners(oldPos,newPos,lpd); |
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}else{
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callListeners(lpo,lpd,((TocItemBranch)newChild.getUserObject()).getLayer()); |
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} |
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} |
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catch (IOException io) { e.rejectDrop(); } |
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catch (UnsupportedFlavorException ufe) {e.rejectDrop();} |
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} //end of method
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public void dropRoot(TreeNode tn){ |
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int oldPos,newPos;
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DefaultMutableTreeNode nodoTocado =
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(DefaultMutableTreeNode) tn;
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// get old parent node
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if (getSelectedNode()==null)return; |
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DefaultMutableTreeNode oldParent = (DefaultMutableTreeNode) getSelectedNode().getParent(); |
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if (oldParent!=null){ |
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oldPos = oldParent.getIndex(getSelectedNode()); |
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//Destino
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DefaultMutableTreeNode destParent=null; |
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newPos=0;
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destParent=nodoTocado; |
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//make new child node
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DefaultMutableTreeNode newChild = (DefaultMutableTreeNode)getSelectedNode().clone(); |
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oldParent.remove(getSelectedNode()); |
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destParent.insert(newChild,newPos); |
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com.iver.andami.ui.mdiManager.IWindow[] views=PluginServices.getMDIManager().getAllWindows();
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for(int i=0;i<views.length;i++){ |
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if (views[i] instanceof View){ |
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((DefaultTreeModel)((View)views[i]).getTOC().getTree().getModel()).reload(oldParent); |
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} |
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} |
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// ((DefaultTreeModel)model1).reload(oldParent);
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DefaultTreeModel model = (DefaultTreeModel) getModel(); |
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model.reload(destParent); |
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FLayers lpo=null;
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FLayers lpd=null;
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lpo=(FLayers)((TocItemBranch)getSelectedNode().getUserObject()).getLayer().getParentLayer(); |
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for(int i=0;i<views.length;i++){ |
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if (views[i] instanceof View){ |
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if (((View)views[i]).getTOC().getTree().equals(this)){ |
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lpd= ((View)views[i]).getMapControl().getMapContext().getLayers();
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} |
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} |
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} |
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if (destParent.equals(oldParent)){
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callListeners(oldPos,newPos,lpd); |
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}else{
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callListeners(lpo,lpd,((TocItemBranch)newChild.getUserObject()).getLayer()); |
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} |
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} |
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} |
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/** DropTaregetListener interface method */
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public void dragEnter(DropTargetDragEvent e) { |
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} |
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/** DropTaregetListener interface method */
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public void dragExit(DropTargetEvent e) { |
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} |
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/** DropTaregetListener interface method */
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public void dragOver(DropTargetDragEvent e) { |
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/* ********************** CHANGED ********************** */
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//set cursor location. Needed in setCursor method
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Point cursorLocationBis = e.getLocation();
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TreePath destinationPath =
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getPathForLocation(cursorLocationBis.x, cursorLocationBis.y); |
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// if destination path is okay accept drop...
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if (testSameComponent(e))
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{ |
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String msg = testDropTarget(destinationPath, SelectedTreePath);
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if ( msg == null) { |
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e.acceptDrag(DnDConstants.ACTION_MOVE) ;
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return;
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} |
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} |
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// ...otherwise reject drop
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// else {
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// System.err.println(e.getDropTargetContext().getComponent());
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// if (testSameComponent(e))
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e.rejectDrag() ; |
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/* else
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e.acceptDrag(DnDConstants.ACTION_MOVE); */
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// }
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/* ****************** END OF CHANGE ******************** */
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} |
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/** DropTaregetListener interface method */
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public void dropActionChanged(DropTargetDragEvent e) { |
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} |
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private void setSelectedNode(DefaultMutableTreeNode smtn){ |
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if (smtn!=null) |
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SelectedNode=smtn; |
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} |
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|
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/** TreeSelectionListener - sets selected node */
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public void valueChanged(TreeSelectionEvent evt) { |
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SelectedTreePath = evt.getNewLeadSelectionPath(); |
501 |
/* com.iver.andami.ui.mdiManager.View[] views=PluginServices.getMDIManager().getAllViews();
|
502 |
for(int i=0;i<views.length;i++){
|
503 |
if (views[i] instanceof View){
|
504 |
if (SelectedTreePath == null) {
|
505 |
((View)views[i]).getTOC().getTree().setSelectedNode(null);
|
506 |
}else{
|
507 |
((View)views[i]).getTOC().getTree().setSelectedNode((DefaultMutableTreeNode)SelectedTreePath.getLastPathComponent());
|
508 |
}
|
509 |
}
|
510 |
} */
|
511 |
if (SelectedTreePath == null){ |
512 |
setSelectedNode(null);
|
513 |
}else{
|
514 |
setSelectedNode((DefaultMutableTreeNode)SelectedTreePath.getLastPathComponent());
|
515 |
} |
516 |
} |
517 |
|
518 |
/** Convenience method to test whether drop location is valid
|
519 |
@param destination The destination path
|
520 |
@param dropper The path for the node to be dropped
|
521 |
@return null if no problems, otherwise an explanation
|
522 |
*/
|
523 |
private String testDropTarget(TreePath destination, TreePath dropper) { |
524 |
//Typical Tests for dropping
|
525 |
|
526 |
//Test 1.
|
527 |
boolean destinationPathIsNull = destination == null; |
528 |
if (destinationPathIsNull)
|
529 |
return "Invalid drop location."; |
530 |
|
531 |
//Test 2.
|
532 |
DefaultMutableTreeNode node = (DefaultMutableTreeNode) destination.getLastPathComponent(); |
533 |
if ( !node.getAllowsChildren() )
|
534 |
return "This node does not allow children"; |
535 |
|
536 |
if (destination.equals(dropper))
|
537 |
return "Destination cannot be same as source"; |
538 |
|
539 |
//Test 3.
|
540 |
/* if ( dropper.isDescendant(destination))
|
541 |
return "Destination node cannot be a descendant.";
|
542 |
|
543 |
//Test 4.
|
544 |
if ( dropper.getParentPath().equals(destination))
|
545 |
return "Destination node cannot be a parent."; */
|
546 |
|
547 |
return null; |
548 |
} |
549 |
|
550 |
private boolean testSameComponent(DropTargetEvent e) |
551 |
{ |
552 |
oDnDtocDestination = this;
|
553 |
return (oDnDtocOrigin == oDnDtocDestination);
|
554 |
} |
555 |
/**
|
556 |
* @param arg0
|
557 |
* @return
|
558 |
*/
|
559 |
public boolean addOrderListener(ITocOrderListener arg0) { |
560 |
return m_Listeners.add(arg0);
|
561 |
} |
562 |
/**
|
563 |
* @param arg0
|
564 |
* @return
|
565 |
*/
|
566 |
public boolean removeOrderListener(ITocOrderListener arg0) { |
567 |
return m_Listeners.remove(arg0);
|
568 |
} |
569 |
private void callListeners(int oldPos, int newPos,FLayers lpd) |
570 |
{ |
571 |
for (int i=0; i < m_Listeners.size(); i++) |
572 |
{ |
573 |
ITocOrderListener listener = (ITocOrderListener) m_Listeners.get(i); |
574 |
listener.orderChanged(oldPos, newPos,lpd); |
575 |
} |
576 |
} |
577 |
|
578 |
private void callListeners(FLayers lpo,FLayers lpd,FLayer ls){ |
579 |
for (int i=0; i < m_Listeners.size(); i++) |
580 |
{ |
581 |
ITocOrderListener listener = (ITocOrderListener) m_Listeners.get(i); |
582 |
listener.parentChanged(lpo,lpd,ls); |
583 |
} |
584 |
} |
585 |
|
586 |
} //end of DnDJTree
|